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v1.7.6 - I127 SRIM Gap Confirmed Stable

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@MarkWSavage MarkWSavage released this 20 Jul 08:40
v1.7.6
f982fb6

Confirms I127's SRIM stopping-power gap (13%, the largest of the six heavy ions checked in v1.7.5) is a real, stable result rather than a statistics or transcription artifact.

I127 statistics confirmation

  • Reran I127's SRIM cross-check at 10x the events (Macros/run_I127_srim_check_10k.mac, 10000 vs. 1000).
  • LET moved from 42.736 to 42.782 MeV*cm2/mg (ratio 0.874 -> 0.875) while the mean's standard error shrank from 0.123% to 0.052% of the mean -- essentially no change despite tighter statistics.
  • SRIM's 48.92 MeV*cm2/mg value was also independently re-checked and confirmed unchanged.
  • The 13% gap is real and stable on both sides -- ordinary Geant4-vs-SRIM stopping-power model variation, not a sampling or data-entry artifact. See Documentation/PANDA_VALIDATION_SUMMARY.md Section 1.4.

See README.md for details.

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